Elevator-brake control



Jan. 27, 1931. E. TURNER 1,790,030

ELEVATOR BRAKE CONTROL Filed Dec. 19. 1928 Zinc.-

INVENTOR. Freda/70A 5. 747m A.TTORNEY j l n' 7, 1 .1, i it J I 510 means. 1

. drawings, wherein:

1 Fig. 2 is an enlarged?perspectiveyiew of mounted in the member 12 and a bell crank a nut 14 on the out-er face of the, member 9 members from the supports and rotating 9 v i A O TROL I o I V 1 implicat n filed llecember lfi, 192g. Serial No. 327, Q8 5 My inventionrelatestotransmissions for tion; The shoemembers are urged apart elevators and more'particularly to brakes for against -,the influence of the spring by a controlling said transmissions, the principal jointed lever 16 comprising alongitudinally; objects of the invention being to'operate a adjustable rod '17 pivotallyqmountedbetween a plurality of bral'ies from common source, cars 18 on one of the-brake shoe membersand 5 to operate'thebrake's coincidently andtopro on arcuate lever 19 pivotally mounted be vide for adjustment of the several brak'etweenfears 20 on theotherbrake shoe memoperating members for accurate functioning herand pivotally connected'ivith the rod 17; under the influence of the common operating whereby pivoting of the mefnberli) will cause 7 i 1 the jointed lever; to move towardstraight In accomplishing these and other objects position to separate the shoe member-sand of the inventiom'l 'haveprovided improved release the shoes'from thezpulley. U V details of structure,the preferred forms'of A similar brake control'device is mountwhich are illustrated in the accompanying ed on the brake shoe "membersfor control- 7 ling the tract-ion sheave including a rod 21 l V'Fig. 1 is a perspective View of elevaton slidable in openi'ngsin the b-rakeshoe 'meIn-v operating mechanism'includingbrake shoes hers, a spring 22 normallyholding the shoes and means embodving my invention for con in frictional engagement with the sheave, a

trolling'the brakes. longitudinally adjustab-le rod 28-pivctally members of the brake controlled mechanism lever 24 pivotallymountedin the member 11 shown separated: a on a fulcrum 25 and including an arm 26 Fig 3 is an elevationof-thersolenoid and on which the outer end of the rod. 23 is pivbrake controllingleveri oted, and an arm 27 extending right+angular 2 Referring in detail to the drawings: ly to the first named: arm which may heop- 1 desi nates a motor 2 a traction sheave erated't'o rotate the member 24 and separate and 3 a brake pot containing a solenoid or the brake-shoemembersagainst the influence magnet for operatin a brake controlling of the spring 22. a lever lpivotally supported by the pot, the I provide means foroperating the levers 30 motor sheave and pot being supported on a 16 and 24, comprising a bar 28 having its base frame 5 and comprising wellknown eleouter end secured to the lever arm of the ments of an elevator machine. U I pulley control lever 16, a longitudinally ad- A shaft 6 extends into a Worm gear housjust-able rod 29' including clevis 30 piv ing 7 and is operatively connected with the otally'mounted on aupin 31 extendinglcen I 35 sheave for rotating the same. A pulley 8 trally-and transversely inthebar, and a lo'n- '8 fixed to the'shaft carries a brake drumand a gitudinally adjustable opera-tingirod 32 "inbrake shoe comprising hinged halves 9' and eluding a clevis 33-pivotally connected to His adaptedfor frictionally engaging the the outer end of the bar and a socket menu pulley to control the motor While a similar ber 3 f.pivotally 'mounted in the outer and shoe comprising hinged halves ll and 12 is of-the lever Each of: the rods includes a frictionally engageahle with the sheave to threadedbolt on whichtlic clcvisa-ndsocket control the same. membersare threaded. 7 Y 7 A rod 13 extending in openings of the Therods'l'l', 23, 29 and82 maybe adjusted. brake shoe-members 9 and 10 is anchored by asto length by removing the clevisa-nd socket and a spring 15 bearing againstthe opposite th'emoverthe threaded bolts; the rods being end of the rod and the other member of the set :in readjusted position by'loc'k nuts such brake shoe tends to urge the hinged members as 35. 7 i r together to frictionally en age the pulley for The arm 27 of the lever 24 .is preferably normally restraining the pulley against rotaelongated for my special purpose by mounting thereon a bar 36 and pivot-ally mounting the rod 29 on the outer end of said bar,- Whereby the arm27 may extend outwardly: from the sheave for positioning the rod 29 for mounting the clevls of the same on the bar .28 that is secured to the operating arm ofthe lever 16. The arm 26. of the bell cranl; lever is provided With aplurality of openingssuch as 87. for selectively receiving the pivot .pin

normally frictionally engaged with the pulley and tract on sheave, respectwely, and

energization of the magnet will cause the lever-Al to move n (In1Ill ,1-ClOClWlS8;.l1I(- Ct10n 1n the illustrated structure to move the'rod 32 for raising thehorizontal bar-ESQ The raising of-the b-ar QScoinCidently causes the operation of the lever, 24 to move the shoe members 11 and 12 apart for releasing the traction sheave and the operation of the operating lever arm of the jointed lever 16 to move the brake shoe members 9 and apart againstithe influence-of the spring forrc leasing'the pulley. The adjustable rodsvn'i-ay be shortened or lengthened for effecting coincident operationof the several members. For example, tli'ef .o1nted lever ofthe pulley control device may be'adjusted consequently on p eluding a soleno d m said. circuit and a lever changed frictional 'conditions'to permit the lever to operate the brake shoe members for the desired result Withont affectingthe adjustment o'fthe sheave control members: and the relation of the samejto the reciprocating rod operated by the magnetlever. 4E, i .Vvhat I claim and desire to secure by Let.- ters Patent is v 1 1. In a'device of the character described including a plurality of sets of brake shoes and anxoperatingleverforieach set of shoes, a

bar connected vvith one of the levers, an adustable rod plvotally connected With the other lever and with said bar, an adjustable trod pivotally connected with said bar, and

means for reciprocatingthe last named rod. 2. In combination with elevator operating mechanism including a cable, a sheave, a driving shaft having driving connection with the sheave, a brake for the shaft, and a lever for controlling the brake, a brake on the sheave controlled b'y'said lever. r 1 V 3. In combination with elevator operating mechanism includinga driving shaft, a traction drum ,in-driven'relation with the driving'shaf-t, a brake for controlling the driving shaft. a lever for controlling said brake, and a brake for the drum. means connecting the drum brake *ith the lever for enabling said leverto control the drum brake; I

l. In combination with elvatoroperating mechanism including a driving shaft and a traction drum, brake shoes engageable respectively withfthe driving shaft and the tractio-n' drum, and means including a solenoid and a member controlled by-the solenoid for controlling the shaftbrake shoes, means con trolled by said member for co'ntrollingthe drum brake shoes, 7

5. In elevator apparatusincluding driving means, a traction drum fconstant driven relation with the driving'jmeans, means for braking the driving means, means including a lever for rendering the braking means effective, and ab'rakefor the drum, means operable by said lever'for renderingthe drum brakeeifective. I c

6. In elevator apparatus including a motor, a shaft driven by the motor, a traction drum in constant driven relation with the shaft, brake shoes for-braking the shaft, a spring forroperating the shaft shoes, means operating againstthe spring 'to hold the shaft shoes in open position, and means forreleass ing the "holding means, brake shoes for the traction drum, a spring for operating the drum shoes, and,meansioperableby the shaft shoe holding means i 7. In apparatusofthecharacter described,

including a motor, a circuit for energizing the motor, a. drire shaft, a worm on the shaft, a Worm wheel,- a-traction drum operably connected with said wheel, a springoperated brake shoe for stopping thedrive shaft vvhen the circuit to the motor is broken, means-hr operable by the solenoid and operating against the lnflnence ofsaid spring to hold the brake shoe in open positioma brake shoe 

